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User's Manual

1. OFF is selected for flow control the lower baut rate should be set to ensure normal communication 5 3 Remote Control Annunciators There is a REM remote control annunciator on the front panel of the load When the load receives the remote command SYSTem REMote via RS232 or GPIB interface the REM remote control annunnciator turns on In remote control status all operations on the load are controlled by the remote controller the front panel keypad and knob has no effect except and adkeys The REM remote control annunciator turns off and the load returns to the local control after receiving the command to return to local control e g SYST LOC Or you can return the load to local control from remote control by pressing and keys 5 4 Sending a Remote Command You can use the computer to set operation mode and operation parameters remotely for the load 5 5 Returning Data The load can return the values of parameter settings input voltage and current as well as input power to computer It can also return information relating to the internal operation and module identification For example the query MEAS CURR asks the load to return the actual input current at the Input binding posts Please refer to ARRAY 372x Series Electronic Load SCPI 63 Programming Guide for detailed information on using queries The load stores the response to the query in an output buffer which will hold the information until it is read
2. Sets the mode TRAN ON Enables the transient operation VOLT LLEV Sets a value to low level VOLT HLEV 5 Sets a value to high level TRAN LTIME 400ms Sets a value to low level time TRAN HTIME 200ms Sets a value to high level time 44 TRAN RTIME 10ms Sets a value to time for rising edge TRAN FTIMR 20ms Sets a value to time for falling edge TRAN MODE CONT Selects continuous transient operation INPUT ON Turns on the load 4 5 6 Pulsed Transient Operation Examplel Assume that the load is in external triggering mode set the load current value to periodically switch between 1A and 5A set the time for rising edge TimeR tolOms set high level time TimeH to 200ms set time for falling edge TimeF to 10ms the load is in pulsed transient operation and a trigger occurs at this time 0 000V 0 000A Press key to enter into the mode selection and parameter 0 000A CCH OFF setting menu use amp Y keys to select CCH mode press key to confirm and exit the mode selection and parameter setting menu m 0 000V 0 000A Press key to enter into transient operation The display 0 5004 CCH OFF shows t to indicate in CCH status LevelL 1 000A Use Entry keys or use the knob together with lt 4 gt keys to gt LevelH 1 000A set LevelL to 1 and press key to confirm gt TimeL 400 00ms Use Entry keys or use the knob together with gt keys to TimeH 400 00ms set LevelH to 5 and press key t
3. User s Manual Programmable DC Electronic Load 3 2x series Chapterl General Introduction tl Funcion Features A AA AA AA eS l Oe TON RIDEN Siirto A E 2 DTG el EAN IPP AN o O oe yeasts eatonec Gna yeaatesentones Gnas enact ses ones Gustnce etenesOusdenecinee 2 PA Seypad Puncuon iS ie 3 ESA CLAUOLS A AAA AA AAA AA AA AA Aaa E dub euaicuralnal nd 4 EA A A A A aoa ira date AEE 4 Dose MAIN Ei VG Cte teeta se tea ede teesaaa taeda tests tae ies A wees 4 LO2 Mode and Parameter Settine Med A Rd eR 5 1 6 3 Transient Operation MCI xccssce2 exit ec eect ak td ds 6 1 6 4 Sequence List Operation Menu nicesi ec certs ek cdas 6 KADEA A ON Oe OR Oe eT Ce 7 LS Remote Pro aA 8 c55 04 a ees basses eects ie eee 9 Chapter Functions and PCat ai A A A A AAA A AAA A A AAA 10 DA Loca land Remote OMT Olcott ata lll rl ini tidied ates 10 22 Propraminma ble Sas tii AAA AA AA 10 23 Basic A A oe A E N 10 2 51 Constant Current Mode CO as 11 a A A E eptediniedtometee 11 2 3 1 2 Immediate Current Level ccccccccccccccseeeesecscececeeeeees 1158 RE MBE 2 5 15 Tris ered Cute nt Veli sees iest o e 11 2 5 14 Transient utrent Ela te waddiurssuaisennedes 12 Dial Sy O LEW al UGB IA LANL AAA A E EEE EEE EAR A 12 232 COnstant volado Mode C V essnee e A A a Ioe 12 A CUR ANN AA AAA 12 2 3 2 2 IMMediate Voltage Eli A cactcecneteeans 12 2 Lo pered Molar Le oa 13 A A A O A An 13 Zo Constant Res Istanco Modera is 13 2 Deda l SEINE AO Si A
4. CURRent FALL RATE lt NRf gt If the current fall rate is 0 1A us and the current set level is 20A then the current rise rate is shown as below when the input is turned off 204 LOA 25 Fig 2 15 Current Fall Rate Note The Curr Fall Rate can be effective only in CCH and CCL mode and the set level is 10 times larger than the actual current fall rate in CCL 2 10 Measurement Function The electronic load has measurement system with high resolution The input current level and voltage level can be measured in real time The input power level and resistance level can be computed with the input voltage level and current level Each measured value can be checked through LCD display or via the command MEASure 2 112 11 Saving and Recalling The electronic load is provided with a EEPROM memory which can save various parameters such as modes input status current voltage resistance transient settings and limits etc 372x Series electronic load can save 10 groups of parameters All parameters relevant to saving and recalling operation are listed in list2 1 The 10 groups of parameters stored in location 0 9 can be saved and recalled by pressing 2 and keys or via the remote command SAV lt NR gt and RCL lt NR gt The parameter saved in location 0 will be recalled automatically every time when the load is turned on List 2 1 Current Hlevel Transient current high level Current Llevel Transient cu
5. e key to select the parameter On Press key to confirm o 0 000V 0 000A 0 000A CCH OFF 4 12 8 Key Sound Example Enable the key sound Operation Descriptions Display Load Default Press Menu key to enter into the main menu Yes No Key Sound Use Y key to select the menu item Key Sound use the knob On Off or a key to select the parameter On Press key to 0 000V 0 0004 0 000A CCH OFF 4 12 9 Communication Interface Examplel Select RS232 interface set the baut rate to 9600 set parity check to None set data bit to 8 set stop bit to 2 enable the flow control Operation Descriptions Display Step Load Default m Press key to enter into the main menu Yes No Step2 v Interface Use key to select the menu item Interface use the knob or RS232 USB GPIB a key to select the parameter RS232 Press key to confirm Step3 v Baud Rate Use key to select the menu item Baud Rate use the knob 9600 19200 ora gt keys to select the parameter 9600 Press key to confirm Step4 v Parity Check Use key to select the menu item Parity Check use the None Even Odd knob or a key to select the parameter None Press key to confirm Step3 Data Bit Use LV key to select the menu item Data Bit use the knob or g 7 a key to select the parameter 8 Press key to confirm 6l Use Lv key to select the menu item Stop Bit use t
6. 35ms the time resolution is 10us and the maximum test frequency is 50kHz Transient test can be turned on and off via Tran y at the front panel or via remote command TRANsient ON OFF Before you turn on transient test you should set the load to the desired mode Note In transient test the Von point and current limit should be taken into consideration which may cause the shut down of the input so that the transient test is interrupted 2 4 1 Continuous Transient Operation In continuous operation the load periodically switches between high low levels The relevant the associated parameters such as low level LevelL high level LevelH low level time TimeL high level time TimeH time for rising edge TimeR time for falling edge TimeF and continuous transient operation can be set through transient operation menu or via remote command CURRent LLEVel lt NRf gt CURRent HLEVel lt NRft gt VOLTage LLEVel lt NRft VOLTage HLEVel lt NRf gt RESistance LLEVel lt NRf gt RESistance HLEVel lt NRft gt TRANsient LTIMe lt NRf gt TRANsient HTIMe lt NRft gt TRANsient RTIMe lt NRf P TRANsient FTIMe lt NRf gt TRANsient MODE CONTinuous 16 For example assume that the CCH range is active and the input is in OFF status then the transient parameters should be set as follows Press key to enter into transient operation Press key to open transient operation menu Set the following parameters in tran
7. Selects the external trigger input TRAN ON Enables transient operation TRAN LLEV 5 Sets transient current low level to 5A TRAN HLEV 10 Sets transient current high level to 10A TRAN RTIM 100us Sets the time for transient rising edge to 100us TRAN FTIM 200us Sets the time for transient falling edge to 200us TRAN MODE TOGG Selects toggled operation INPUT ON Turns on the input Get the trigger by receiving an external trigger signal Figure 2 8 shows the current waveform of the load before it is triggered and after it has been triggered respectively the electronic load starts operation at the transient low level SA when the input is turned on For the first trigger the load current reaches and remains at the high level 10A after 100us duration of rising edge When the second trigger is received the load current will reach and remain at the low level SA after 200us duration of falling edge Each trigger leads to one toggle operation 100us TRIG TRIG TRIG Fig 2 8 Toggled Transient Operation 2 5 Sequence List Operation Besides Transient operation the electronic load provides more flexible list operation which can make the load operate according to the preset sequence and synchronize with external signal The list operation allows you to program a series of sequence steps and the operation mode the load values the duration time for each step can be set The sequence operation can be executed in the CC CV and CR modes Th
8. Sequence list start key Start 5 Sequence list stop key a al 6 Battery discharge operation key JM 7 Insert key Insert 8 8 Delete key 9 9 Sequence list operation key u Decimal point Trigger key Clear or exit Clear protection Prot Clear Transient operation menu Input Input on off Right key wes Switch key for secondary function Note Up and Down key can be used as a switch key for displaying load status and actual power during basic test modes 1 5 Annunciators OREM Indicates that the electronic load is in remote status eRR Indicates that a remote programming error s has occurred 1 6 Menu 1 6 1 Main Menu Press key to enter into main menu Please see the list below for main menu content Load Default Restore default Short Short circuit mode On Off On Off Von Latch Von latch Off Off e Von Point Set Von point CV Curr Limit Current limit in CV mode Curr Rise Rate Current rise rate in CC mode Curr Fall Rate Current fall rate in CC mode Trig Function Trigger function selection Transient test Sequence list test Knob Enable disable knob function Key Sound Enable disable key sound Interface Remote interface selection RS232 USB GPIB RS232 USB GPIB RS232 Interface Baud Rate Baud rate setting 2400 4800 9600 19200 38400 2400 4800 9600 19200 38400 Parity Check Parity check setting None Even Odd None Even Odd Data Bit Data bits length 8 7 Sbits 7bits Stop Bit Stop bit length
9. Transient Operation Examplel Assume that the load is in external triggering mode set the load resistance value to periodically switch between 200 Q and 500 Q set the time for rising edge TimeR tol0ms set time for falling edge TimeF to 10ms the load 1s in toggled transient operation and a trigger occurs at this time Operation Descriptions Display 0 000V 0 000A Press key to enter into the mode selection and parameter 20 0002 CRH OFF setting menu use amp Y keys to select CRH mode press key to confirm and exit the mode selection and parameter setting menu 0 000V 0 000A Press key to enter into transient operation The display 2000 02 CRH OFF shows t to indicate in CRH status 46 3 OS a Press S key to enter into the transient operation menu Use Entry keys or use the knob together with J gt keys to set LevelL to 200 and press key to confirm Use Entry keys or use the knob together with 4 gt J keys to set LevelH to 500 and press key to confirm Press Y key to select TimeR use Entry keys or use the knob together with J gt keys to set TimeR to 10ms and press key to confirm Use Entry keys or use the knob together with lt 4 gt keys to set TimeF to 10ms and press key to confirm Usel gt keys or knob to set Mode value to Togg and press key to confirm One trigger occurs when pressing 2nd Fao key or the signal at the trigger input terminal TRIG IN 1s low
10. by the computer or is replaced with new information 5 6 Remote Programming Commands The SCPI commands have many optional key words for the programmer Getting familiar with those key words will help you to know the programming better Most of the commands have a query syntax which allows the present parameter settings to be returned to the controller Please refer to ARRAY 372x Series Electronic Load SCPI Programming Guide for details The load s major functions can be programmed with a relatively few number of these commands The following points are important to remember when you are remotely programming CC CR CV and CP values 5 6 1 Modes The CC CR CV and CP values can be programmed whether or not the associated mode is active If the input is turned on all of the applicable values will take effect at the input when the associated mode is selected 5 6 2 Transient Levels The transient CC CV or CR level must be set to a higher level than the respective low level or the transient operation will be disabled 5 6 3 Programmable Current Protection When programmable current protection is enabled and the programmed current limit and time delay are exceeded the load s input will be turned off 5 7 CC Mode Example This example sets the current level to 0 5A and then reads back the actual current value INPUT OFF Turns off the load s input 2 MODE CCL Selects the CCL mode 3 CURR 0 5 Sets curren
11. exit the mode selection and parameter setting menu 5 a 0 000V 0 000A a Press key to turn on the load 44 000A sCCH ON For the above operating procedures the corresponding SCPI commands should be INPUT SHORT ON Sets the load to short circuit operation MODE CCH Sets the mode INPUT ON Turns on the load Example2 Based on the last example exit the short circuit operation and turn off the load Operation Descriptions Display Press Menu key to enter into main menu and select Short short circuit item with Lv key 2 Use key or knob to set Off and press key to confirm 0 000V 0 000A 0 000A CCH ON Clear Press key to exit the main menu On the display s disappears in CCH status 0 000V 0 000A Input Press key to turn off the load 0 000A CCH OFF For the above operating procedures the corresponding SCPI commands should be INPUT SHORT OFF Sets the load to exit the short circuit operation INPUT OFF Turns on the load 4 7 Transient Operation The operating procedures for transient operation are shown below l Press key to enter into the mode selection and parameter setting menu use amp Y 42 keys to select one basic test mode press key to confirm and exit the mode selection and parameter setting menu Zi Press tan key to enter into transient operation The display shows t to indicate in the basic test mode de Press key to enter into the transient operation
12. key to enter into battery discharge parameters edit screen Usel A Lv keys to select the parameter Use Entry keys or the knob together with 4 gt keys to input termination voltage value and discharge current value Press Enter key to confirm 4 Press key to exit the battery discharge parameters edit screen O Presento key to turn on the load and start battery discharge operation 6 Presento key to turn off the load and stop battery discharge operation 53 Clear Ta Press Enem key to clear the discharged time and discharged capacity of the battery 6 l 8 Pressl2 4 4 bus keys to exit the battery discharge operation Examplel Enter into the battery discharge operation set the termination voltage to 15V and the discharge current to 3A turn on the load and start the battery discharge operation turn off the load and stop the battery discharge operation clear the discharged time and discharged capacity of the battery exit the battery discharge operation Operation Descriptions Display Step 1 20 000V 0 000A onloff Presser key to turn off the load and connect the tested battery 0 000A CCH OFF correctly Step2 l 20 000V 0 000A Press 274 ous keys to enter into battery discharge operation 0 000AH 00 00 00 screen Step3 gt Min Volt 0 000V Press key to enter into battery discharge parameters edit screen DisCurr 2 000A Use Entry keys or the knob together with 4 gt keys to input terminat
13. level gt LevelL 2000 0 2 LevelH 2000 0 2 LevelL 200 00 2 gt LevelH 2000 0 2 gt TimeL 400 00ms TimeH 200 00ms TimeR 10 00ms gt TimeF 10 00ms gt Mode Puls gt gt Mode Togg 0 000V 0 0000A 200 00 22 tCRH OFF 0 000V 0 0000A 200 00 2 tCRH ON 0 000V 0 0000A 500 00 2 CRH ON For the above operating procedures the corresponding SCPI commands should be MODE CRH Sets the mode TRAN ON Enables the transient operation RES LLEV 200 Sets a value to low level RES HLEV 500 Sets a value to high level TRAN RTIME 10us Sets a value to time for rising edge TRAN FTIME 10us Sets a value to time for falling edge TRAN MODE TOGG Selects toggled operation INPUT ON Turns on the load Trig One trigger occurs 47 4 6 Sequence List Operation After sequence editing the operating procedures for enabling and disabling sequence operation are shown as below 9 l l Press mm keys to enter into sequence operation menu Use Entry keys or the knob to select list number No and press key to confirm Clear Press key to exit sequence operation menu Press mm keys to activate sequence operation Press 2na fF keys to stop sequence operation The operating procedures for sequence operation are shown below l 10 IT 6 Press mm keys to enter into sequence operation menu Use Entry keys or the knob to select list number No and press key to confirm Use key to
14. menu 4 Usel A Lv keys to select the parameter 5 Use Entry keys or use the knob together with 4 gt J keys to set values for LevelL LevelH TimeL TimeH TimeR and TimeF Use e gt keys or knob to set Mode value i key to exit the transient operation menu Input T Presslonott key to turn on the load 8 If it is the pulsed transient operation or the toggled transient operation one trigger occurs when pressing 2nd key or the signal at the trigger input terminal TRIG IN is low level 4 5 5 Continuous Transient Operation In continuous operation the load periodically switches between high low levels The relevant parameters such as low level LevelL high level LevelH low level time TimeL high level time TimeH time for rising edge TimeR time for falling edge TimeF Examplel Set the load voltage value to periodically switch between 1V and 5V set the time for rising edge TimeR to 10ms set high level time TimeH to 200ms set time for falling edge TimeF to 20ms set low level time TimeL to 400ms and the load is in continuous transient operation The operating uaa are shown as below 0 000V 0 000A Press LS set key to enter into the mode selection and parameter 0 000V CV OFF setting menu use Ea Y keys to select CV mode press key to confirm and exit the mode selection and parameter setting menu 0 000V 0 000A 80 000V tCV OFF Press tan key to enter into transient
15. modes 1 6 4 Sequence List Operation Menu 19 E 7 A Press 2nd key and then press to enter into the list operation menu which is shown as No Select sequence list number PO a Memo Sequence memo 10 Data lt New Edit gt Create a new or edit an existing Chain Off Sequence number to be chained with 0 6 off Press a and keys in sequence list operation menu to select Data lt New Edit gt and below select New or Edit with the knob or a and P Jkeys Then press key to enter into sequence data editing status which is shown as below 01 10000 00000s Sequence List number CCH 5 000A Time Mode Set value 1 7 Display Messages CC Mode The first line shows actual voltage and current levels The second line shows current set level CC mode CCH indicates constant current high range CCL indicates constant current low range and input status of the load ON OFF 2 CV Mode The first line shows actual voltage and current levels The second line shows voltage set level CV mode and input status of the load ON OFF 8 CR Mode The first line shows actual voltage and current levels The second line shows resistance level CR mode CRL indicates constant resistance low range CRM indicates constant resistance medium range and CRH indicates constant resistance high range and input status of the load ON OFF 4 CP Mode The first line shows actual voltage and cu
16. programmed settings In local control if the input is turned on the load status can not be switched directly among the basic modes transient operation list operation and battery discharge operation etc The load can be switched from one operation status to another operation status only when the input 1s turned off 2 9 2 Von Point Von Latch When the external input voltage is less than the Von Point the load will not be enabled even though the input has been turned on The load will be enabled till the external input voltage reaches or exceeds the Von Point Von Latch is used to latch the active status of the load If the Von Latch function is enabled once the input voltage reaches Von Point the input will be turned on and stay in ON status regardless of the changes from the external input voltage even though the input voltage is less than the Von point Please see figure 2 11 if the Von Latch function is disabled once the input voltage reaches Von Point the input will be turned on automatically and once the input voltage is less than the Von Point the input will be automatically turned off Please see figure 2 12 The automatically turning on off of the input can be implemented via setting the Von Point and Von Latch which simplifies test operation greatly The Von Voltage can be set in main menu or via the remote command INPut VOLTage ON lt NRf gt The Von Latch can be set in main menu or via the remote command INPut VOL
17. the cycle times Count use Entry keys or the knob together with J gt keys to input set value Press Enter key to confirm and save the cycle times Count in EEPROM assigned by the sequence number 15 Use Y key to select Chain use Entry keys the Chain is OFF when the Entry key exceeds 6 or the knob to input the set value Press key to confirm 16 Press key to exit sequence operation menu 17 Press 2nd fun keys to activate sequence operation 18 Press 2na Eso keys to stop sequence operation 4 6 1 Sequence List Editing Examplel Edit a new sequence The sequence number is 0 the sequence Memo is Test Power the sequence steps stepl1 CCL 1A 1S step2 CCH 2A 1S step3 CV 1V 1S step4 CRL 192 15 step5 CRH 200 Q 1S the cycle times Count for sequence operation is 5 disabling the sequence chain starting sequence operation stopping sequence operation Operation Descriptions E a Press 204 2na keys to enter into sequence operation menu Meno Use Entry keys or the knob to set the sequence number No to gt No 0 and press key to confirm recall the sequence in EEPROM assigned by the sequence number y to select sequence memo Memo Memo 4 Rotate the knob to select the letter T No 0 RES eee 5 No 0 a ee 49 Rotate the knob to select the letter e No 0 Set Memo to Test Power according to step5 and setp6 No 0 gt Memo Test Pow
18. toggle operation will be executed and another transient level will be reached after the duration of rising edge or falling edge The associated parameters such as transient low level LevelL transient high level LevelH time for rising edge TimeR time for falling edge TimeF and toggled transient mode can be set through transient operation menu or via remote command CURRent LLEVel lt NRf gt CURRent HLEVel lt NRf gt VOLTage LLEVel lt NRf gt VOLTage HLEVel lt NRf gt RESistance LLEVel lt NRf gt RESistance HLEVel lt NRf gt TRANsient RTIMe lt NRf gt TRANsient FTIMe lt NRft gt TRANsient MODE PULSe The low level time TimeL and high level time TimeH have no effect on toggled transient operation The trigger can be an external trigger signal received via the TRIG input on the front panel pressing the key the GPIB GET function the TRG common command or the TRIG subsystem command For example assume that the CCH range is active and the input is in OFF status then the transient parameters should be set as follows Press key to enter into transient operation Press key to open transient operation menu Set the following parameters in transient operation menu LevelL 5 000A LevelH 10 000A TimeL 0 50ms TimeH 0 50ms TimeR 0 10ms TimeF 0 20ms Mode Togg Input Then press key to turn on the input 19 Or via remote command to set SCPI Command Description TRIG SOUR EXT
19. 0 50ms TimeH 0 50ms TimeR 0 10ms TimeF 0 10ms Mode Puls Input Then press key to turn on the input Or via remote command to set SCPI Command Description TRIG SOUR EXT Selects the external trigger input TRAN ON Enables transient operation TRAN LLEV 5 Sets transient current low level to 5A TRAN HLEV 10 Sets transient current high level to 10A TRAN HTIM 500us Sets transient high level time to 500us TRAN RTIM 100us Sets the time for transient rising edge to 100us TRAN FTIM 200us Sets the time for transient falling edge to 200us TRAN MODE PULS Sets pulse trigger operation INPUT ON Turns on the input 18 Get the trigger by receiving an external trigger signal Figure 2 7 shows the current waveform of the load before it is triggered and after it has been triggered respectively the electronic load starts operation at the transient low level 5A when the input is turned on For each trigger the load current reaches the high level 10A after 100us duration of rising edge and remains at 10A for 500us Then after 200us duration of falling edge the current returns to the transient low level 5A q _ __ ie 100us 500us 200us 100us 500us 200us TRIG TRIG Fig 2 7 Pulsed Transient Operation 2 4 3 Toggled Transient Mode The trigger function is required for toggled transient operation When there is no trigger occurs the load remains at a transient level After a trigger has been received a
20. 1s turned on 0 000V 0 000A Move the cursor to the tenths with key 5 100A CCH OFF Rotate the knob to set the tenths to 8 0 000V 0 000A The set value will be changed when rotating the 5 8004 CCH OFF knob The set value will become effective at input at once when the load is turned on 0 000V 0 000A 5 800A CCH ON For the above operating procedures the corresponding SCPI commands should be Input Press key to turn on the load 36 MODE CCH Sets the mode CURR 5 8 Sets the current value INPUT ON Turns on the load Note CCH CCL will be shown respectively in the lower right corner of the display when the load is in CCH status or CCL status 4 5 2 CV Mode Examplel Set the load to CV mode and the voltage value to 50V in CCH mode Turn on the load and check the present power value The operating procedures are shown below Operation Descriptions Display MODE CCH Press Set key to enter into the mode selection and CURR 3 800A parameter setting menu v MODE CV Use key to select CV mode VOLT 80 000V Use Entry keys or use the knob together MODE CV VOLT 50 000V with 4 gt J keys to input the voltage value to 50 0 000V 0 000A Press key to confirm and exit the mode 50 000V CV OFF selection and parameter setting menu 0 000V 0 000A Input Press key to turn on the load 50 000V CV ON 0 000V 0 000A Check the present power value with a Y 50 000V 0 000W keys For t
21. 2 Functions and Features In this chapter 1t will be explained in details with examples 4 1 Local Control If you need to control the load via operations on the front panel the load must stay in the local control status The load enters into local control status once it is powered on and preset parameters saved in EEPROM location 0 will be recalled automatically Under remote control status all operations on front panel keypad and knobs become invalid except 274 Cocca keys When the load receives a remote command SYST REM via RS232 or GPIB the remote control goes into effect and REM annunciator is turned on Under remote control status all operations on electronic load are controlled by remote controller The electronic load will return to local control after receiving the return command e g SYST LOC o Or you can return the electronic load to local control by pressing 2nd land keys 4 2 Main Operation on the Front Panel Comnecting to the Power Supply Turning the Input On Off CC Mode CV Mode CR Mode CP Mode Short Circuit Operation Continuous Transient Operation Pulsed Transient Operation Toggled Transient Operation Sequence List Operation Battery Discharge Operation Saving and Recalling Parameters Clear Protection Settings Error Messages Triggered Operation Main Menu 4 3 Comnecting to the Power Supply Connect the positive pole of the power supply to the INPUT terminal and connect the nega
22. A A ii 14 2 932 Immediate Resistance Yelena aci ci 14 251525 ee red Resistance Lovers 14 25 A Transient Resistance in 14 2 3 4 Constant Power Mode CEP a ot 14 A A 15 2 322 immediate POWER Leve liarla 15 A a Power Wey el A AN 16 DA Transient Operaatio D airean des stada demented uted adeamcnta ld ted adeacatles disks tenuate leans 16 2 4 Continous Transiciones 16 242 Pulsed Transient GC GCAO ia 17 24 3 Toge ked Transient Operanon eeni eee ee ceded ami eee ee ee eee 19 O AAA 20 2 0 Battery DisChat oe O pe iia 21 DPS OL CM CUI pera Oria 22 LIS LO Ered O LS 22 2 9 put CA de E EE EOE AA EE AA EE A E 23 D FUTON ON AAA E e che ee tee e 23 EI NAAA A 23 29 AMEN EN MA a o a 24 A ite blue E atte dbus AEE caged ae 25 DCE MG WANN AUG ie A A 25 2 IO Measurement FUNCHON cae E A E EEEN 26 DA Savne and REA A Boat a OS 26 2 12 Reading Remote Programming ETTOTS 20 A A td Zi SSA RODO ote cic des static E oppure aid 21 E A O A 28 214 1 leanne latched Pro A e eee ee 28 DNA DOVER ONES adds 28 DTU UM O A 28 DA AsV CLOW Fann a a one nadsaad e E e E E EE 29 ZIA CV CELE MPC as 29 2 446 Reverse Volta ferari n A A E A A 29 DV SoA AMAA ye FUNCIONS Ad dd ide 29 Zoe PUNCMOM SCI CULO I ainia 29 DV A KM OOP UG A AA 29 IS A IA 29 St A e A A 30 SI he Eea EE ta a tacts EN E Mase et sane S E aso nases 30 32 Environment Installation Location A A A OR Ea 30 3 3 POWER Sd tebeo tases 30 3 4 Connections on Mhe Rear Panel rd A A ble 31 3 5
23. Comectons on the Front Pano litio liliana 32 BO WAIN eaa A a este ae acess 32 Chapter 4 Local Qe rare ii 0 A AA AA A A Cases ease ra 34 AM AAA Re ee er EO A 34 42 Main OperatiomOn the Front Pane learn ea eiea eA EA ER 34 A Conmecune tothe Power Ue a 34 AA Turno th put OO TE A aired ance ad da diia 35 AS AS UC MSS E A E E cc ae tsps E E oid Ro a ede A AE AT 35 A A A A 35 A O eet sets 37 4 3 O AA II II II II II OEE A 38 E A A A A E E AEA 40 4 5 5 Continuous Transient O petalOn A a 43 4576 Pulsed Transient Operational 45 A527 TOS EA TETERA 46 AG Sequence hist OPE ON A i 48 01 Sequence L OTN tina iaa 49 4 6 2 Modifying Adding Inserting Deleting the Sequence List occccccccccccccnccccocicininos 51 4 6 Starting Stopping the Sequence LISt ococccccccnnnccococononnnononononnnnnonnnnnnnnnnnnnnnnnnnnnnnnnnnnnns 52 4 Battery Dis chato Opera och oie xa rates aati a tela N 53 A A 55 AO GC Tear AAN AAA A A A alone S6 ANE ET ROU MOSSIE Si tania 56 us A II Men nee S6 Ab SN cI EE OA E UU ET TO ea att ta cde Passat ne E E IE EET E A OEE waste coon eect bt tee NAS 57 A 2A Moai Detail NAICS SE 57 412 2 Short Circuit Operation A A das 57 412 Von Pont Von Late UA ga Sahin cele A cds ete ele id En 58 AND Ane item Merman wie VOU tratada adi 59 425 Gutrent Rise Pall Raton CC Mode nerne 59 4 12 6 Trig Ser Funcion Selecti ns iia did dd dd 60 A GN AAA E Tenn We ne 60 MALA A ected tl tend EE tend E tad Senda te siss
24. Entry keys or the knob to select saving or recalling position FERF H M E o 3 Press Enter key to confirm and exit the saving or recalling menu If the saving is selected the values of List2 1 parameters will be saved in the specified location in EEPROM if the recalling is selected the values of List2 1 parameters should be the values saved in specified location in EEPROM Examplel Set the mode to CCL set the current value to 2A turn on the load save the settings in location 0 in EEPROM the next time the load is turned on these settings will become the power on settings Operation Descriptions Display l Set the mode to CCL set the current value to 2A turn on the load 0 000V 0 000A detailed operations 2 0000A CCL ON Save File Press l ra lsa Ua key to enter into the saving menu MN Press Entry keys or the knob to select the location 0 for saving 0 000V 0 000A MN Press Enter key to confirm and exit the load saving menu 20000A CCL ON For the above operating procedures the corresponding SCPI commands should be MODE CCH Sets the load to CCH status CURR 2 Sets the current value to 2A SAV 0 Saves the present settings in location0 in EEPROM Example2 Based on the above example set the mode to CV set the voltage value to 40V turn off the load recall the values saved in location0 in EEPROM The detailed operations are shown below Operation Descriptions Display Set the mode to CV set the voltage val
25. Fig 3 2 lees O82 onnl IN A O O o El 3 2 Input Connections Input connections are made to two binding posts INPUT INPUT on the front panel The maximum wire diameter is 6mm In order to enhance the test accuracy and reduce the test error when executing large current test it would be better to use thicker wire Remote Sense Remote sensing is made to two terminals SENSE and SENSE It compensates for the voltage drop caused by the power supply and input wire resistance to achieve greater accuracy The load can detect voltage inputs automatically so there is no need to modify the parameter settings or change the hardware wiring when using remote sensing TRIGGER Connections The external trigger input terminal on the front panel is a BNC connector in which the middle part is the input and the outer casing is the input It receives 5V TTL compatible falling edge trigger signals 3 6 Wiring Sense Connections When greater accuracy of voltage test is needed it is necessary to connect Sense input and the load will switch to Sense status automatically The relevant wiring is shown as fig 3 3 32 Bin Bip SENSE INPUT Parallel Connections Figure 3 4 illustrates how two or more loads can be paralleled in CC or CR mode when high power or large current is needed HME OUTPUT El 3 4 33 Chapter 4 Local Operation The local operation of the load has been briefly introduced in Chapter
26. HTIM 300us 7 TRAN RTIM 10us 8 TRAN FTIM 20us 9 TRAN MODE CONT 10 TRAN ON 11 INPUT ON Turns off the load s input Selects the CV mode Sets the transient low level to 0 5V Sets the transient high level to 1V Sets transient low level time to 200us Sets transient high level time to 300us Sets the time for transient rising edge to 10us Sets the time for transient falling edge to 20us Selects the continuous transient operation Activates the transient operation Turns on the load s input 5 10 Pulsed Transient Operation Example This example selects CV pulsed transient operation selects the bus as the trigger source and 1 INPUT OFF 2 MODE CV 3 TRIG SOUR BUS 4 VOLT LLEV 0 5 5 VOLT HLEV 1 6 TRAN HTIM Ims 7 TRAN RTIM 10us 8 TRAN FTIM 10us 9 TRAN MODE PULSE 10 TRAN ON 11 INPUT ON 12 TRG load s input programs a pulse width of 1 millisecond Turns off the load s input Selects the CV mode Selects the bus as the trigger source Sets the transient low level to 0 5V Sets the transient high level to 1V Sets transient high level time to 1ms Sets the time for transient rising edge to 10us Sets the time for transient falling edge to 10us Selects the pulsed transient operation Activates the transient operation Turns on the load s input TRG command generates a I millisecond high level pulse at the 65 66
27. Tage ON LATCh ON OFF 23 Fig 2 11 Von Latch Is Enabled Fig 2 12 Von Latch Is Disabled Note If the load is unable to operate normally please check the setting of Von Point 2 9 3 Current Limit in CV Mode The CV Curr Limit is used to limit the maximum input current in CV mode If the voltage is still larger than the set level while the current limit has been reached the load will switch to the CC mode Please see figure 2 13 The input will not be turned off in the CV current limit which is different from the software current limit The CV Curr Limit can be set in main menu or via the remote command CV CURRent LIMIt lt NRf gt 24 ENE rae th FL te RR E H Eik FL Lam hte HER L MEREEN l BAERE l l limit EA FED Fig 2 13 CV Curr Limit 2 9 4 Current Rise Rate The Current Rise Rate is used to set the current rise rate in CC mode It can be set in main menu or via the remote command CURRent RISE RATE lt NRf gt If the current rise rate is 0 1A us and the current set level 1s 20A then the current rise rate is shown as below when the input is turned on Fig 2 14 Current Rise Rate Note The Current Rise Rate can be effective only in CCH and CCL and the set level is 10 times larger than the actual current rise rate in CCL 2 9 5 Current Fall Rate The Current Fall Rate is used to set the current fall rate in CC mode It can be set in main menu or via the remote command
28. a UNE lbit 2bits Flow Control Enable disable Flow control On Off On Off USB Interface BS USB selection GPIB Interface GPIB Address GPIB address 5 Address value Note Except knob key sound and interface configurations the other parameters in main menu will not be saved when the load is turned off If it is needed to save the parameters please use key or sav command When the load is turned on next time the saved parameters in location 0 will be recalled automatically 1 6 2 Mode and Parameter Setting Menu Press key to enter into mode and parameter setting menu which is shown as below MODE CCL Constant current low range MODE CCH Constant current high range MODE CV Constant voltage mode MODE CRL Constant resistance low range MODE CRM Constant resistance medium range Immediate resistance level MODE CRH Constant resistance high range MODE CPV Constant power voltage source mode POWR 0 000W W Immediate power level MODE CPC Constant power current source mode POWR 0 000W W Immediate power level 1 6 3 Transient Operation Menu Press key in desired mode to enable its transient operation and press key to enter into transient setting menu which is shown as below ee wal 1 000A LevelH Transient high level Time for transient low level 600 00ms Time for transient high level 600 00ms MODE Continuous Cont Pulse Puls Toggle Togg Note Transient operation may be used in CC CV and CR
29. ad and load appear in this manual refer to ARRAY 372x Series Electronic Load if there is no special explanation 1 1 Function Features Main function and features of ARRAY372x Series 4 basic functions CC CV CR and CP 8 basic test modes CCL CCH CV CRL CRM CRH CPV CPC The 24 bit A D and 17 bit D A converters incorporated provide this equipment with greatly enhanced setting and measurement resolution 100kHz D A conversion rate fully improves high speed performance Minimum operating voltage is less than 0 6V at the load s full rated current With optional low voltage testing devices the maximum current can be achieved even though the input voltage is OV This is especially suitable for fuel cell solar cell and other new energy test applications Perfect protection assures high reliability in the most complicated of test environments Innovative design of CPV and CPC modes effectively improves the practicability of CP mode Circuit improvement greatly enhances the dynamic response of CR mode and widens the application scope of that mode High speed transient operation with separate high low level time and rising falling time control Powerful sequential test function with a minimum step time of 10us and a maximum step time of 10000s Cyclic numbers can be adjusted freely and a sequence can be chained to another sequence to achieve even more complex test procedures The input binding posts with their innovative desi
30. confirm and save the Chain value in the EEPROM assigned by the sequence number 0 000V 0 000A 0 000A CCH OFF 0 000V 0 0000A 1 000A CCL ON 0 000V 0 000A 0 000A CCH OFF For the above operating procedures the corresponding SCPI commands should be LIST RECALL 0 Recalls the sequence of the number 0 LIST MEMO Test Power Sequence memo is Test Power LIST DATA CCL 1A 1S LIST DATA CCH 2A 1S LIST DATA Cv 1V 1S LIST DATA CRL 1 9 18 LIST DATA CRH 200 2 1S The above 5 commands are sequence steps LIST COUNT 5 Cycle times for this sequence LIST CHAIN OFF Disables the chained sequence LIST ON Activates sequence operation LIST OFF Stops sequence operation 4 6 2 Modifying Adding Inserting Deleting the Sequence List Exampell Based on the examplel in 4 6 1 section the step1 modify the time to 2s Add CCH SA 1S to the last step Insert CRL 1 Q 10S at step3 Delete step2 The sequence is chained to itself to realize the continuous execution Operation Descriptions Display Step 1 gt No 0 Press mm keys to enter into sequence operation menu Memo Test Power Step2 v gt Data lt New Edit gt Use key to select Data lt New Edit gt l Count 5 l Step3 i 01 1 00000s Use gt key or knob to select Edit and press key to 1 0000A confirm Step4 1 00000s Use gt key to select time parameter and the time set value 1 0000A flashes Step5 2 00000s Use Entry keys or the
31. ct the menu item 3 Use the knob ET gt keys to select the parameter or use Entry keys or the knob together with 4 gt keys to input set value Press ici key to exit modifying the parameter or exit the main menu 4 Press key to confirm T 5 Press key to exit the main menu 4 12 1 Loading Default Values Example Load the default values The detailed operations are shown below Operation Descriptions Display Load Default Press Menu key to enter into the main menu Yes No Load Default Yes No Use the knob or EJ key to select the parameter Yes Press key to confirm 4 12 2 Short Circuit Operation Example Short circuit operation in CV mode The detailed operations are shown below Operation Descriptions Display Load Default Press Men key to enter into the main menu Yes No 57 Use Lv key to select the menu item Short use the knob or a key to select the parameter On Press key to confirm 0 000V 0 000A Set l l Press S key to enter into the mode selection and parameter 0 000V sCV OFF setting menu useLA Y keys to select CV mode Press key to confirm and exit the mode selection and parameter setting 5 TT 0 000V 0 000A a Press eet key to turn on the load 0 000VsCV ON For the above operating procedures the corresponding SCPI commands should be INPUT SHORT ON Sets the load to short circuit MODE CV Sets the mode INPUT ON Turn
32. ctor using DTR and DSR to execute flow control The pin assignment is shown below Pin Input Output Description 1 Not used 2 Input RXD Receive data 3 Output TXD Transmit data 4 Output DTR Data terminal ready 5 Common GND Ground 6 Input DSR Data set ready 7 Not used 8 Not used 9 Not used The interface parameters can be set in the MENU you can use SCPI language for programming to realize the communication with the load GPIB Interface The load provides a GPIB interface and you can set its address to any value between 0 and 30 in MENU When multiple GPIB devices are connected each device on the GPIB interface must have a unique address that is not be used by the devices on other interfaces The address is set to 05 when the load is shipped from the factory The default setting can be changed when you are setting the interface 31 USB Interface The load provides a USB interface You need to install the software provided by the factory in PC to realize communication with the load USB and GPIB interfaces occupy the same expansion slot on the rear panel so only one type interface can be chosen to install at the same time meanwhile only one type interface can be used by the load to communicate with external devices 3 5 Connections on the Front Panel The terminals on the front panel include input terminals INPUT INPUT remote sense terminals SENSE SENSE and an external trigger input terminal See
33. ds on the present mode of the load CCL the short circuit current is 4 4A CCH the short circuit current is 44A CV the short circuit voltage is OV CRL the short circuit resistance is 1 802 CRH the short circuit resistance is 18 2 CPV the short circuit power is 420W CPC the short circuit power is OW The other set values will not be changed when the short circuit operation is enabled Note in short circuit operation the Von point and current limit level should be taken into consideration which may cause the shut down of the input so that the short circuit operation is interrupted 2 8 Triggered Operation The triggered operation is mainly used to make the load keep synchronized with other test equipments or events Array 372x series electronic load provides various triggering modes which can be applied to the following occasions o Triggering a preset level Transfers all pending preset levels to the immediate levels For the presently active mode the new level will appear at the input at once if the input is turned on For the modes which are not presently active the preset levels will not take effect at the input until the corresponding mode becomes active o Triggering a transient pulse Gernerates a transient pulse in accordance with the preset transient parameters when pulsed transient operation is active o Triggering a transient toggle Switches the input between the transient low level and transient high le
34. e minimum duration for each step is 10us and the maximum one is 99999 99999s around 27 78 hours The list operation allows to be executed cyclically and the cycle times can be set the different list can be chained so that when one list has been executed the another chained list will be enabled which further perfects the capability of the list test to implement more complicated test task Each list can contain 50 steps at most and the load can store 7 lists The associated parameters of list operation can be edited and set through list operation menu or via remote command The load provides convenient list editing function When the user is operating input edit sequence step it is easy to check the previous and subsequent steps and it is allowed to be edited inserted and deleted immediately which simplifies the list input operation effectively The set value of each step will be automatically saved when exiting from step edit menu and the other list parameters will be saved immediately after been edited The list operation also can be implemented via the remote command Please make sure the transient operation has been disabled before enabling list operation In list 20 operation if the operation mode for next step is different from the present step the load will automatically have a 5ms delay after the present step is over to avoid the probable current surge The load s input will be turned off during this Sms delay Figure 2 9
35. eiving the return command e g SYST LOC Or you can return the electronic load to local control by pressing 2nd Jand silkoys Details of local operation are covered in Chapter 4 Local Operation and fundamentals of remote programming are given in Chapter 5 Remote Operation Complete SCPI programming details are given in the ARRAY 372x Series Electronic Load SCPI Programming Guide 2 2 Programmable Features Main functions features of electronic load CC constant current Mode CCL CCH CV constant voltage Mode CV CR constant resistance Mode CRL CRM CRH CP constant power Mode CPV CPC Transient Operation Tran Sequence List Operation Battery Discharge Operation Battery Short Circuit Operation Short 2 3 Basic Test Function There are four modes of operation constant current CC constant voltage CV constant resistance CR constant power CP The test mode and the associated parameters can be set via front panel or remote command The load will remains in that mode until the mode is changed If the mode is changed when the load s input is in ON status the load will be turned off for around 5ms automatically The set value for electronic load becomes effective immediately when the load is turned on If the 10 input set value exceeds the allowed range it will be automatically limited at maximum value or minimum value 2 3 1 Constant Current Mode Constant current mode has two ranges the hi
36. er operations Press key to confirm v gt Data lt New Edit gt Use key to select Data lt New Edit gt l Count 1l Clear Data E Use a key or knob to select New and press key to Yes No confirm 0 00000s Use a key or knob to select Yes and press Enter key to 0 000A confirm The data is cleared and step edit screen appears Edit the stepl CCL 1A 1S The time set value in the upper 1 00000s right corner of the display flashes Use Entry keys or the knob 0 000A together with gt keys to input time tols and press Enter Key to confirm The basic mode in lower left corner of the display flashes Use 1 00000s 0 000A the knob or Set key to select operating mode to CCL and press key to confirm The set value in the lower right corner of the display flashes 1 00000s 1 0000A Use Entry keys or the knob together with 4 gt keys to 0 00000s CRH 20 000 2 to edit the step6 Press tw key to exit step edit screen and save the sequence data in EEPROM assigned by the sequence number Data lt New Edit gt Count 5 Use LV key to select Count use Entry keys or the knob together with 4 keys to input 5 Press key to confirm and save the Count value in EEPROM assigned by the sequence number 17 gt Chain Off Use Lv key to select Chain use Entry keys the Chain 50 is OFF when the Entry key exceeds 6 or the knob to input Off PresslEntey key to
37. er to the ARRAY 372x Series Electronic Load SCPI Programming Guide for detailed introduction of all SCPI commands 62 5 1 Communication Interface 5 1 1 RS232 RS232 interface is standard Use the cable shipped with the load to connect the load to a computer correctly Select RS232 interface in the MENU and set the baud rate parity data bit stop bit and flow control parameters to be used Set the same parameters in the software on the computer and input the right SCPI command to operate the load 5 1 2 USB USB interface is optional It can be used only when the load has installed USB communication module and the relevant driver has installed on the computer Use USB cable to connect the load to a computer correctly Select the USB interface in the MENU and input the right SCPI command to operate the load 5 1 3 GPIB GPIB is optional It can be used only when the load has installed GPIB communication module and the relevant driver has installed on the computer Use GPIB cable to connect the load to a computer correctly Select the GPIB interface in the MENU and set GPIB address Each instrument you connect to the GPIB interface has a unique address assigned to it Input the right SCPI command to operate the load 5 2 Flow Control Selection When RS232 interface is used the flow control can be enabled or disabled The load provides two options ON and OFF ON enabling the flow control OFF disabling the flow control When
38. ess key in basic mode to enter into mode selection and parameter setting menu Choose CR mode with a and keys Input the resistance value via the Entry keys or the knob with a and keys Use Enter ey for confirmation The CR mode and parameters can also be set via remote command MODE CRL MODE CRM MODE CRH RESistance lt NRf gt ay A A HH He bt y hak i A HEL Yii ji Fig 2 3 CR Mode 13 2 3 3 1 Setting Ranges In constant resistance low range CRL the resistance setting range is 0 02 2 2 in constant resistance medium range CRM the resistance setting range is 2 200 9 in constant resistance high range CRH the resistance setting range is 20 2000 Q If the range is changed in CR mode while the load s input stays ON status the load will be turned off for around 5ms automatically For example when the load is switched from CRL to CRH the input will be turned off around Sms Besides it is noted that the resistance set level may have changed to fit the new range when the resistance range 1s changed For example the present setting is CRM 10 000 2 when the load is switched from CRM to CRL the resistance set level will change to the maximum level 2 0000 Q for CRL 2 3 3 2 Immediate Resistance Level The immediate resistance level refers to the resistance set value in CR mode which can be set via mode selection and parameter setting menu or via remote command RESistance lt NRf gt The immediate resistance
39. f gt CURRent LLEV lt NRf gt 2 3 1 5 Software Current Limit The electronic load allows the user to set a current limit 0 40A via remote command CURRent PROTection lt NRf gt The load will be turned off with beeping alarms if the current limit 1s exceeded beyond a programmable time delay 0 001 60s Please note that the software current limit is in effect for any mode of operation 2 3 2 Constant Voltage Mode CV In CV mode the load will attempt to sink enough current to control the source voltage to the programmed value see fig 2 2 Press key in basic mode to enter into mode selection and parameter setting menu Choose CV mode with A and BW 6ys Input the voltage value via the Entry keys or the knob with EJ and gt keys Use Enter ey for confirmation The CV mode and parameters can also be set via remote command MODE CV VOLTage lt NRf gt T fi V A y FR Abi Fig 2 2 CV Mode 2 3 2 1 Setting Ranges The voltage setting range is 0 80V 2 3 2 2 Immediate Voltage Level The immediate voltage level refers to the voltage set value in CV mode which can be set via 12 mode selection and parameter setting menu or via remote command VOLTage lt NRf gt The immediate current level can also be modified directly with left right keys da gt and the knob 2 3 2 3 Triggered Voltage Level The triggered voltage level refers to the preset voltage value which can become immediate voltage level auto
40. gh range CCH and the low range CCL The high range provides wider test range The low range provides better resolution at low current settings In CC mode the load will sink a current in accordance with the programmed value regardless of the input voltage see fig 2 1 Press key in basic mode to enter into mode selection and parameter setting menu Choose CCH or CCL mode with A andy Input the current level via the Entry keys or the knob with a and gt keys Use Enter ey for confirmation The CC mode and parameters can also be set via remote command MODE CCL MODE CCH CURRent lt NRf gt y dat 4 i i Ik HAL Fig 2 1 CC Mode 2 3 1 1 Setting Ranges In constant current low range CCL the current setting range is 0 4A in constant current high range CCH the current setting range is 0 40A If the range is changed in CC mode while the load s input stays ON status the load will be turned off for around 5ms automatically For example when the load is switched from CCL to CCH the input will be turned off around 5ms Besides it is noted that the current set level may have changed to fit the new range when the current range is changed For example the present setting 1s CCH 10 000A when the load is switched from CCH to CCL the current set level will change to the maximum level 4 0000A for CCL 2 3 1 2 Immediate Current Level The immediate current level refers to the current set value in CC mode which can be prog
41. gn are especially suitable for large current testing Provides short circuit test battery discharge test and other auxiliary functions A high efficiency intelligent cooling system can effectively reduce system temperature and enhance power density Automatic ON OFF function simplifies test operation Knobs and digital keypad makes the operation more convenient Save recall function can save multiple groups of general settings Supports SCPI Standard Commands for Programmable Instrumentation and Labview and provides necessary PC software 1 2 Front Panel Fig 1 1 Front Panel Orco Function key power switch external trigger input terminal remote sense terminal Input binding posts Knob 8 Entry keys secondary function keys Mancia switch key for secondary function OL eft amp Right key up amp Down key Display switching key 1 3 Rear Panel GOGO Figl 2 Rear Panel Mac input socket Line voltage switch ruse holder rs232 Interface crip or USB optional 1 4 Keypad Function There are three groups of keypads on the front panel the Function Keys the Entry Keys which composite with secondary functions and the Direction Keys The secondary functions of the Entry Keys are printed in blue To use the secondary function please press key first then press the relevant key List 1 1 Description for Keys 0 0 Local key Local 1 Save key 2 2 Recall key Recall 3 Error code display key 4
42. he above operating procedures the corresponding SCPI commands should be MODE CV Sets the mode VOLT 50 Sets the voltage value INPUT ON Turns on the load Example2 Set the voltage value to 60V in CV mode Turn on the load and there are two ways to set the voltage value Solution 1 MODE CV PressLS key to enter into the mode selection and CURR 50 000V parameter setting menu Use Entry keys or use the knob together MODE CV VOLT 60 000V with 4 gt J keys to input the voltage value to 60 37 0 000V 0 000A 60 000V CV OFF Press key to confirm and exit the mode selection and parameter setting menu 4 Input 0 000V 0 000A NN Press key to turn on the load 60 000V CV ON Solution 2 Operation Descriptions Display 0 000V 0 000A Move the cursor to the tens with a key 50 000V CV ON Rotate the knob to set the tens to 6 0 000V 0 000A The set value will be changed when rotating the 60 000V CV OFF knob The set value will become effective at input at once when the load is turned on 3 TT 0 000V 0 000A a Press key to turn on the load 60 000V CV ON For the above operating procedures the corresponding SCPI commands should be MODE CV Sets the mode VOLT 60 Sets the voltage value INPUT ON Turns on the load Note CV will be shown in the lower right corner of the display when the load is in CV mode 4 5 3 CR Mode CR Mode includes constant resistance low range CRL constant re
43. he knob or gt key to select the parameter 2 Press key to confirm Flow Control Use Y key to select the menu item Flow Control use the On Off knob or a key to select the parameter On Press key to confirm 0 000V 0 000A 0 000A CCH OFF Example2 Select GPIB interface set the address to 18 Operation Descriptions Display Step 1 Load Default IS Press key to enter into the main menu Yes No Step2 v Interface Use key to select the menu item Interface use the knob or RS232 USB GPIB gt key to select the parameter GPIB Press key to confirm Step3 GPIB Address 18 Use Lv key to select the menu item GPIB Address use Entry keys or the knob together wit J gt keys to select the parameter 18 Press key to confirm 0 000V 0 0004 0 000A CCH OFF Chapter5 Remote Programming Operation ARRAY 372x Series Electronic Load supports both local operation and remote control The previous chapter has introduced how to use the front panel keys and knobs to operate on the load This chapter will introduce you to how to use program the load from the remote controller The similarities between local and remote programming will become apparent as you read this chapter The intent of this chapter is to help users quickly become familiar with remote programming operations Programming examples given in this chapter use the SCPI commands in their simpliest form Please ref
44. he mode 1 80009 CRL OFF selection and parameter setting menu 0 000V 0 000A op F Press key to turn on the load 1 80002 CRL ON Solution 2 Operation Descriptions Display 0 000V 0 000A Move the cursor to the tenths with key 1 5000 CRL OFF Rotate the knob to set the tenths to 8 0 000V 0 000A The set value will be changed when rotating the 1 80002 CRL OFF knob The set value will become effective at input at once when the load is turned on 0 000V 0 000A 1 80002 CRL ON For the above operating procedures the corresponding SCPI commands should be Input Press key to turn on the load MODE CRL Sets the mode RES 1 8 Sets the resistance value INPUT ON Turns on the load Note CRH CRM CRL will be shown respectively in the lower right corner of the display when the load is in CRH status CRM status or CCL status 39 4 5 4 CP Mode CP Mode includes constant power current source mode CPV and constant power voltage source mode CPC Examplel Set the load to CPV and set the power value tol00W in CRL Turn on the load and check the present power value The operating procedures are shown below Operation Descriptions Display l MODE CRL Press S t key to enter into the mode selection and RES 1 80002 parameter setting menu 2 v MODE CPV Use key to select CPV POWR 0 000W 3 Use Entry keys or use the knob together MODE CPV POWR 100 00W with 4 gt J keys to input the power value t
45. ient low level again at last The associated parameters such as transient low level LevelL transient high level LevelH high level time TimeH time for rising edge TimeR time for falling edge TimeF and pulsed transient mode can be set through transient operation menu or via remote command CURRent LLEVel lt NRf gt CURRent HLEVel lt NRf gt VOLTage LLEVel lt NRf gt VOLTage HLEVel lt NRf gt RESistance LLEVel lt NRf gt RESistance HLEVel lt NRft gt TRANsient HTIMe lt NRf gt TRANsient RTIMe lt NRft gt TRANsient FTIMe lt NR f gt TRANsient MODE PULSe The low level time TimeL has no effect on pulsed transient operation In order to get a pulse an explicit trigger 1s required The trigger can be an external trigger signal received via the TRIG input on the front panel pressing the key the GPIB GET function the TRG common command or the TRIG subsystem command The trigger becomes effective only when the load remains at transient low level Each trigger leads to one pulse In the duration of rising edge transient high level and falling edge any trigger will be ignored For example assume that the CCH range is active and the input is in OFF status then the transient parameters should be set as follows Press key to enter into transient operation Press key to open transient operation menu Set the following parameters in transient operation menu LevelL 5 000A LevelH 10 000A TimeL
46. ies lactams E AO A 61 A 12 9 Cominuin cation A xaxcpekace econ E Naseer Nees 61 Chapter5 Remote Programming Operation ccccccccsessessssssesesseeeseseeseeeeeeseeseeeeeeeeeeeeeeeeeeseeeeeeeeeas 62 Sl COMMU Gat OM IME AC C5 sales aise dea A Riad 63 SIAM ce pected In A A 63 A A 63 A AA I E In TT EET E 63 DD AA A A a a a a a a T 63 5 3 Remote COMTO lANN CIALO AAA E E E E E es 63 5 4 SENA a REMOS Omran lll ds dd 63 5 9 Returning Dt A A dante ean tess Senta Se ctdins 63 5 6 Remote Programmins Commands sasien a T TNE T 64 A A a e a ae 64 A NN ee en 64 5 6 3 Programmable Current Protec id ered eerie doe E 64 ION MO eE CaN LG tants Ascott hse aah ase A Nea hacen tee seb ecce tanec te cel ce necaaslecdancut tedacdenen tah cee 64 ISCR MO A OE ere enon ee snore 64 5 9 Continuous Transient Operation Example 00ooooonnconoconanononononooooon ono nno nono no nonn nono o nono nono EE EE Ei 65 5 10 Pulsed Transient Operation Exalead 65 yo A at mets ce atte ee 656 Chapter1 General Introduction ARRAY 372x Series programmable electronic load as a new generation product of ARRAY Electronic Co Ltd is designed with high performance It provides you powerful test function user friendly HMI as well as RS232 USB GPIB interfaces to support SCPI and Labview 372x Series is widely used in aerospace shipbuilding automotive electronics solar cell and fuel cell etc scientific research and production field All electronic lo
47. ion voltage to 15V PresslEntey key to confirm Step4 lt lt gt MinVolt 15 000V Use Entry keys or the knob together with keys to put DisCurr 3 000 A discharge current to 3A Press Enter key to confirm Step5 20 000V 0 000A al 0 000AH 00 00 00 Step6 mar 20 000V 3 000A Press ente key to turn on the load and start battery discharge 0 000AH 00 00 01 operation Step7 20 000V 0 000A Presslentott key to turn off the load and stop battery discharge 0 012AH 00 00 15 operation Step8 20 000V 0 000A Press key to clear the discharged time and discharged capacity 0 000AH 00 00 00 of the battery Step9 l z 20 000 V 0 000A Battery 1 1 1 Press l r Enen keys to exit the battery discharge operation 0 000A CCH OFF For the above operating procedures the corresponding SCPI commands should be INPUT OFF Turns off the load BATTERY ON Activates the battery discharge operation screen BATT VOLT OFF 15V Sets termination voltage to 15V BATT DIS CURR 3A Sets discharge current to 3A 54 INPUT ON Turns on the load and start battery discharge operation INPUT OFF Turns off the load and stop battery discharge operationBATTERY OFF Exits the battery discharge operation 4 8 Saving and Recalling The operating procedures for saving and recalling operation are shown below 2 1 Press 2na fsa keys to enter into the saving menu or press 2na 2 keys to enter into the recalling menu 2 Press
48. is a list running diagram for 5 steps See chapter 5 for detailed information about programming lists from the front panel lei zl at a igliz ali a lg la LOOP 1 r14 LOOP 2 Fig 2 9 List Operation Note In list operation the Von point and current limit level should be taken into consideration which may cause the shut down of the input so that the list operation is interrupted 2 6 Battery Discharge Operation The electronic load adopts constant current discharge to test battery capacity The discharge current and termination voltage can be self defined When the battery voltage decreases to the termination voltage the battery discharge test will be stopped automatically The test procedure 1s shown as figure 2 10 The load can real time display battery voltage discharge current discharge time and discharge capacity during the test The maximum battery discharge time is 99hours 99minutes 99 seconds and the maximum battery capacity is 4000AH aseo ea FE fy EE a Fig 2 10 Voltage Current Curve Chart in Battery Discharge Operation Zi 2 7 Short Circuit Operation The electronic load can simulate a short circuit to test the protection performance of the tested device The short circuit operation can be enabled and disabled by setting in the main menu or via the remote command INPut SHORt ON OFF When the short circuit operation is enabled the relevant short circuit value depen
49. it for any obvious damage that may have occurred during shipment Keep the original packing materials in case the load has to be returned to ARRAY in the future Please confirm that there are no broken keys or knobs that the cabinet and panel surfaces are free of dents and scratches and that the display is not scratched or cracked 3 2 Environment Installation Location The load can operate at its full power within the temperature range of 0 C to 40 C and at derated power from 40 C to 55 C or the overtemperature protection will be caused Place the load in a location with good ventilation and keep a distance from electromagnetic interference Do not place the load in the flammable atmosphere Your load must be installed in a location that allows sufficient space at the sides and rear of the load for adequate air circulation The fans cool the load by drawing in air through the sides and exhausting it out the back The rubber bumpers must be removed for rack mounting 3 3 Power On Self Test A power on self test can inspect the basic operations of the load to assure you that the load is operational First check AC power line voltage to verify the power line voltage selected by 110V 220V Toggle Key on the rear panel is in accordance with the proper voltage in your local place Connect the power line cord and a power on self test occurs automatically when you turn on the load If the load detects an error during power on self test
50. knob together with lt 4 gt keys to input 1 00004 the time to 2s and press key to confirm 51 Step6 06 0 00000s Use LY key to select the last new step Step6 CRH 20 000 Step7 Add a new step CCH 5A 1S The set value in the upper right 06 1 00000s corner of the display flashes Use Entry keys or the knob together CRH 20 000 Q with gt keys to input time to Is and press key to confirm The basic mode in lower left corner of the display flashes Use the 06 1 00000s CCH 0 000A Step8 knob or key to select operating mode to CCH and press key to confirm Step9 The set value in the lower right corner of the display flashes Use 06 1 00000s CCH 5 0004 Entry keys or the knob together with 4 gt keys to input the 07 0 00000s current value to 5A Press key to confirm and enter into the CCH 0000A next operation Step10 A 03 1 00000s Use key to select the step3 CV 1 000V Step11 03 0 00000s Press 2ra Cnsen keys to insert a new step at step3 cv 0 000V Step12 Insert a new step CRL 1 92 108 at step3 The setting operations for 103 10 00000s this new step are the same as the operating procedures to 9 CCH 2 000A 02 Press 2 Bues keys to delete the step2 s 10 0000s CRL 1 0000 2 gt Data lt New Edit gt Count 5 Step 14 Step 15 ut key to exit step edit screen and save the sequence data in EEPROM assigned by the sequence number Step 16 gt Chain Off U
51. l be shown in the lower right corner of the display The load will have no response to other operations 2 14 1 Clearing Latched Protection When the load enters into the latched protection status 1t will have no response to other commands The load will return to the normal operation only when the latched protection has been reset via the secondary function ke t or the remote command INPut PROTection CLEar Of course the condition that cause the latched protection must be removed or it will be latched again as soon as it 1s reset In addition when the software overcurrent protection is enabled if the overcurrent time does not exceed the specified protection time the load will display PT to indicate but the input will not be turned off At this time you can reset the overcurrent time with the secondary function key the remote command INPut PROTection CLEar 2 14 2 Overvoltage The overvoltage protection level is set at a predetermined voltage which cannot be changed by the user When the input voltage exceeds this predetermined voltage the overvoltage protection will be enabled and the input is turned off with OV displayed meanwhile the OV and VF status register bits are set and will remain set until they are reset and overvoltage condition is removed 2 14 3 Overcurrent The electronic load allows the user to define a current protection limit When the defined current limit is exceeded the overcurrent ti
52. l have no effect on the input until the CP mode becomes active The triggered power level only can be set via remote command POWer TRIGgered lt NRf gt Once a power level is triggered subsequent triggers will become invalid until another POWer TRIGgered lt NRf gt command is received The trigger sources available to the load will be described in later chapter The electronic load has a status register which can keep track of pending triggers and other operating conditions This status register will be described in details in the ARRAY 372x Series Electronic Load SCPI Programming Guide 2 4 Transient Operation When the transient operation is enabled the load periodically switch between two levels LevelH and LevelL which can be applied to test the dynamic characteristics of the power supply The transient operation can be executed in the CC CV CR modes and has three operating statuses Continuous Pulsed and Toggled Please make sure the sequence List operation has been disabled before enabling transient operation The parameters associated with transient operation are low level LevelL high level LevelH low level time TimeL high level time TimeH time for rising edge TimeR time for falling edge TimeF and operating mode Transient high low level and corresponding CC CV CR modes share one setting range The range for high low level time is 0 655 35ms the range for rising falling edge time is 10us 655
53. lect CCH CURR 0 000A 0 000V 0 000A 5 120A CCH OFF Press key to confirm and exit the mode selection and parameter setting menu 0 000V 0 000A onoff Press key to turn on the load 3 Use Entry keys or use the knob together MODE CCH CURR 5 120A with J gt keys to input the current value to 5 2 5 120A CCH ON 35 0 000V 0 000A 5 120A 0 000W Use LA LY keys to check the present power value For the above operating procedures the corresponding SCPI commands should be MODE CCH Sets the mode CURR 5 12 Sets the current value INPUT ON Turns on the load Example2 Set the current value to 5 8A in CCH Turn on the load and there are two ways to set the current value Solution 1 Procedures Operation Descriptions Display Ea MODE CCH i Press t key to enter into the mode selection and CURR 5 120A parameter setting menu 2 Use Entry keys or use the knob together with U keys to input the current value to 5 8 3 0 000V 0 000A Press key to confirm and exit the mode 5 800A CCH OFF selection and parameter setting menu 4 Input 0 000V 0 000A MN Press key to turn on the load 5 8004 CCHON Solution2 0 000V 0 000A 5 1204 CCH OFF Rotate the knob to set the hundredths to 0 0 000V 0 000A The set value will be changed when rotating the 5 100A CCH OFF knob The set value will become effective at input at Move the cursor to the hundredths with a key once when the load
54. level can also be modified directly with left right keys a gt and the knob 2 3 3 3 Triggered Resistance Level The triggered resistance level refers to the preset resistance value which can become immediate resistance level automatically when a trigger is received If the CR mode and the input are enabled the input will be updated immediately when a trigger occurs If the CR mode is not active this resistance level will have no effect on the input until the CR mode becomes active The triggered resistance level only can be set via remote command RESistance TRIGgered lt NRf gt Once a resistance level is triggered subsequent triggers will become invalid until another RESistance TRIGgered lt NRf gt command is received The trigger sources available to the load will be described in later chapter The electronic load has a status register which can keep track of pending triggers and other operating conditions This status register will be described in details in the ARRAY 372x Series Electronic Load SCPI Programming Guide 2 3 3 4 Transient Resistance Level The load will switch between the transient high resistance level LevelH and transient low resistance level LevelL when the transient operation is enabled The transient resistance level can be set in transient operation menu from the front panel or via remote command RESistance HLEVel lt NRf gt RESistance LLEVel lt NRf gt 2 3 4 Constant Power Mode CP There a
55. matically when a trigger is received If the CV mode and the input are enabled the input will be updated immediately when a trigger occurs If the CV mode is not active this voltage level will have no effect on the input until the CV mode 1s active The triggered voltage level only can be set via remote command VOLTage TRIGgered lt NRf gt Once a voltage level is triggered subsequent triggers will become invalid until another VOLTage TRIGgered lt NRf gt command is received The trigger sources available to the load will be described in later chapter The electronic load has a status register which can keep track of pending triggers and other operating conditions This status register will be described in details in the ARRAY 372x Series Electronic Load SCPI Programming Guide 2 3 2 4 Transient Voltage Level The load will switch between the transient high voltage level LevelH and transient low voltage level LevelL when the transient operation is enabled The transient voltage level can be set in transient operation menu from the front panel or via remote command VOLTage HLEVel lt NRf gt VOLTage LLEVel lt NRf gt 2 3 3 Constant Resistance Mode CR Constant resistance mode has three range the low range CRL the medium range CRM and the high range CRH In CR mode the load will sink a current linearly proportional to the input voltage in accordance with the programmed resistance to make I U R see fig 2 3 Pr
56. mer starts timing and the display will show PT to indicate protection status but the input will not be turned off immediately When the specified delay time is reached the overcurrent protection will be enabled and the input is turned off with OC displayed 28 meanwhile the OC and PS status register bits are set and will remain set until they are reset and overcurrent condition is removed The current protection limit function can only be set via the remote command It is turned on off with the command CURRent PROTection STATe ON OFF The current limit level is set with the command CURRent PROTection lt NRf gt The specified delay time to turn off the input can be set with the command CURRent PROTection DELay lt NRf gt 2 14 4 Overpower The electronic load includes both hardware and software overpower protection functions Once the input power exceeds the maximum rated power the hardware power limit circuit will be enabled immediately to limit the input power within the allowed range in the meantime the load will compute the present actual power No matter the hardware power limit circuit is enabled or use software to compute the overpower protection will become active as long as the overpower time exceeds the specified limit When the overpower protection is enabled the input will be turned off with OP displayed meanwhile the OP and PS status register bits are set and will remain set until they are reset and overpower c
57. o 100 0 000V 0 000A Press key to confirm and exit the mode 100 00W CPV OFF selection and parameter setting menu 0 000V 0 000A Input Press key to turn on the load 100 00W CPV ON 0 000V 0 000A Check the present power value with a Y A 100 00W 0 000W For the above operating procedures the corresponding SCPI commands should be MODE CPV Sets the mode POW 100 Sets the power value INPUT ON Turns on the load Example2 Set the power value to 200W in CPV mode Turn on the load and there are two ways to set the power value Solution 1 MODE CPV PressLS key to enter into the mode selection and POWR 100 00W parameter setting menu Use Entry keys or use the knob together MODE CPV POWR 200 00W with 4 gt J keys to input the power value to 200 0 000V 0 000A Enter i Press Enter key to confirm and exit the mode 200 00W CPV OFF selection and parameter setting menu 4 0 000V 0 000A a Press key to turn on the load 200 00W CPV ON 40 Solution 2 Operation Descriptions Display 0 000V 0 000A 100 00W CPV OFF Rotate the knob to set the hundredths to 2 0 000V 0 000A The set value will be changed when rotating the 200 00W CPV OFF knob The set value will become effective at input at Move the cursor to the hundredths with a key once when the load is turned on 3 TT 0 000V 0 000A NA Press key to turn on the load 200 00W CPV ON For the above operating procedures the cor
58. o confirm gt TimeR 10 00ms Press Y key to select TimeH use Entry keys or use the knob TimeF 20 00ms together with lt gt keys to set TimeH to 20ms and press key to confirm TimeR 10 00ms Use Entry keys or use the knob together with lt 4 gt keys to gt TimeF 20 00ms set TimeR to 10ms and press key to confirm gt Mode Cont gt aa Use Entry keys or use the knob together with lt lt gt J keys to inn 45 NN set TimeF to 10ms and press key to confirm A gt Mode Puls gt Use lt 4 gt keys or knob to set Mode value to pulse and press key to confirm E 0 000V 0 000A w key to exit the transient operation menu 1 000A CCH OFF 0 000V 0 000A onloff Press eno key to turn on the load 1 000A CCH ON 0 000V 0 000A One trigger occurs when pressing 2 4 2nd e key or the signal 5000A CCHON at the trigger input terminal TRIG IN 1s low level For the above operating procedures the corresponding SCPI commands should be MODE CCH Sets the mode TRAN ON Enables the transient operation CURR LLEV Sets a value to low level CURR HLEV 5 Sets a value to high level TRAN HTIME 200ms Sets a value to high level time TRAN RTIME 10us Sets a value to time for rising edge TRAN FTIME 10us Sets a value to time for falling edge TRAN MODE PULS Selects pulsed transient operation INPUT ON Turns on the load Trig One trigger occurs 4 5 7 Toggled
59. ondition is removed 2 14 5 Overtemperature If the internal temperature of the load exceeds safe limits the overtemperature protection will be enabled the input will be turned off with OT displayed in the meantime the OT and PS status register bits are set and will remain set until they are reset and overtemperature condition is removed You must wait until the load cools down to the normal temperature before you can reset the latched protection The fans in the load will help to cool the load as quickly as possible 2 14 6 Reverse Voltage When reverse voltage is applied the reverse voltage protection will be enabled the input will be turned off with RV displayed in the meantime the RV and VF status register bits are set and will remain set until they are reset and reverse voltage is removed 2 15 Auxiliary Functions 2 15 1Trigger Function Selection The Trigger Function in main menu is used to select the trigger object Selecting Tran is used to trigger transient operation and selecting List is used to trigger sequence list operation 2 15 2 Knob Function The Knob in main menu is used to enable disable the knob function Select On to enable the knob function and select Off to disable 2 15 3 Key Sound The Key Sound in main menu is used to control the key sound Select On to activate the key sound and select Off to forbid 29 Chapter3 Installation 3 1 Initial Check When you receive the load please check
60. operation The display shows t to indicate in CV mode 3 gt LevelL 80 000V Press key to enter into the transient operation menu LevelH 80 000V 43 5 2 Use Entry keys or use the knob together with lt 4 gt keys to set LevelL to 1 and press key to confirm Use Entry keys or use the knob together with lt 4 gt keys to set LevelH to 5 and press key to confirm Use Entry keys or use the knob together with 4 gt J keys to set TimeL to 400ms and press key to confirm Use Entry keys or use the knob together with J gt keys to set TimeH to 200ms and press key to confirm The menu will show the next item automatically Use Entry keys or use the knob together with 4 gt J keys to set TimeR to 10ms and press Enter key to confirm Use Entry keys or use the knob together with lt lt gt J keys to set TimeF to 20ms and press key to confirm Use 4 gt keys or knob to set Mode value to Cont and press key to confirm Input Press key to turn on the load LevelL 1 000V gt LevelH 80 000V gt TimeL 530 00ms TimeH 500 00ms TimeL 400 00ms gt TimeH 500 00ms gt TimeR 100 00ms TimeF 100 00ms TimeR 10 00ms gt TimeF 100 00ms gt Mode Cont gt gt Mode Cont gt 0 000V 0 000A 1 000V CV OFF 0 000V 0 000A 1 000V tCV ON 0 000V 0 000A 5 000V tCV ON For the above operating procedures the corresponding SCPI commands should be MODE CV
61. rammed via mode selection and parameter setting menu or via remote command CRRRent lt NRf gt The immediate current level can also be modified directly with left right keys a gt and the knob 2 3 1 3 Triggered Current Level The triggered current level refers to the preset current value which can become immediate current level automatically when a trigger is received If the CC mode and the input are enabled the input will be updated immediately when a trigger occurs If the CC mode is not active this current level will have no effect on the input until the CC mode becomes active The triggered current level only can be set via remote command CURRent TRIGgered lt NRf gt Once a current level is triggered subsequent triggers will become invalid until another CURRent TRIGgered lt NRf gt command is received The trigger sources available to the load will be described in later chapter The electronic load has a status register which can keep track of pending triggers and other operating conditions This status register will be described in details in the ARRAY 372x Series Electronic Load SCPI Programming Guide 2 3 1 4 Transient Current Level The load will switch between the transient high current level LevelH and transient low current level LevelL when the transient operation is enabled The transient current level can be set in transient operation menu from the front panel or via remote command CURRent HLEV lt NR
62. rate by the user O I O I O I KE 2 4 K 2 5 KE 2 6 Fig 2 5 Current voltage Curve for Normal Power Supply As adopting advanced slope detection method Array 372x series electronic load only has to test a part of the current voltage curve to know whether the two curves constant power curve and current voltage curve intersect Therefore when the set power is larger than the actual power the external power supply will not be short circuited by the load because the power is insufficient When the load detects that the power of the external power supply is insufficient the current will stop to be increased at once and the load will try to find constant power point again till the set power is met 2 3 4 1 Setting Ranges The setting range for the power is 0 400W no matter it is CPV mode or CPV mode 2 3 4 2 Immediate Power Level The immediate power level refers to the power set value in CP mode which can be set via mode selection and parameter setting menu or via remote command POWer lt NRf gt The immediate 15 resistance level can also be modified directly with left right keys da gt and the knob 2 3 4 3 Triggered Power Level The triggered power level refers to the preset power value which can become immediate power level automatically when a trigger 1s received If the CP mode and the input are enabled the input will be updated immediately when a trigger occurs If the CP mode is not active this power level wil
63. re two sorts of constant power modes the Constant Power Voltage Source mode CPV and the Constant Power Current Source mode CPC The CPV mode is applied to voltage source test and the CPC mode is applied to current source test In CP mode the load consumes the constant power in accordance with the programmed value regardless of the changes of external current and voltage see fig 2 4 Press key to enter into mode selection and parameter setting menu Choose CPV or CPC mode with a and keys Input the power value via Entry keys or the knob with a and gt keys Use Enter ey for confirmation The CP mode and parameters can also be set via remote 14 command MODE CPV MODE CPC POWer lt NRf gt CPV gt ENS i Ha Tee the K K CPCI Fig 2 4 CP Mode Figure 2 5 are the current voltage curves for several common power supplies The constant power curve is a hyperbola in the first quadrant The constant power curve usually intersects with current voltage curve at two points the CPV point and the CPC point when the power of the external power supply is larger than the set power At the CPV point the power supply shows the feature of voltage source the output power will be increased with increasing current at the CPC point the power supply shows the feature of current source the output power will be increased with increasing voltage Array 372x series electronic load can be set at any one of intersection points to ope
64. responding SCPI commands should be MODE CPV Sets the mode POW 200 Sets the power value INPUT ON Turns on the load Note CPV CPC will be shown respectively in the lower right corner of the display when the load is in CPV or CPC mode 4 6Short Circuit Operation The operating procedures for short circuit operation are shown below l Press Menu key to enter into main menu and select Short short circuit item with Lv key Ze Use 4 key or knob to set On and press Enter key to confirm 66 9 S to indicate in the basic test 4 Press key to enter into the mode selection and parameter setting menu use amp LV keys to select one basic test mode press key to confirm and exit the mode selection and parameter setting menu input D Press lenor key to turn on the load Example1 The load was in CV mode previously and it is turned off Set the load to short circuit in CCH status Turn on the load to execute short circuit operation Operation Descriptions Display Press Menu key to enter into main menu and select Short short circuit item with Y key 41 Use A key or knob to set On and press key to confirm 0 000V 0 000A 0 000V sCV OFF 66 99 nits key to exit the main menu The display shows s to indicate in CV mode 0 000V 0 000A Press key to enter into the mode selection and parameter 44 000A sCCH OFF setting menu use LAN key to select CCH press key to confirm and
65. rrent levels The second line shows power set level CP mode CPC indicates constant power current source mode CPV indicates constant power voltage source mode and input status of the load ON OFF 5 Transient Operation The first line shows actual voltage and current levels The second line shows set level transient operation mode t indicates transient operation and input status of the load ON OFF 6 Sequence List Operation The first line shows actual voltage and current levels The second line shows set level sequence operation mode I indicates sequence list test and input status of the load ON OFF 7 Battery Discharge Operation The first line shows actual voltage and current levels The second line battery capacity and discharge time Short Circuit Operation The first line shows actual voltage and current levels The second line shows set level in 66 99 S short circuit short circuit operation mode indicates short circuit test and input status of the load ON OFF 9 Display Actual Power Pressing LA Jand Y Jkey can switch the display of load status and actual power On the display screen of actual power the first line shows actual voltage and current the second line shows set level and actual power level Protection Status If the protection function is active LCD will display corresponding protection status For example the display of re
66. rrent low level OA Current protection level Current limit ME Current protection delay Current protection delay SA Current protection State Enable disable current off protection Voltage level Immediate voltage level Voltage Hlevel Transient high voltage 80v level Voltage Llevel Transient voltage low level Immediate resistance level 2000 Q 26 Resistance Hlevel Transient high resistance 2000 Q high level Resistance Llevel Transient resistance low level Transient operation Transient test Transient Htime Time for transient high Oms oe Io Transient Ltime Time for transient low Oms Ii a Transient Rtime Time for transient rising edge Transient Ftime Time for transient falling 0 01ms edge Trigger Function Trigger function selection Battery Mode Battery discharge off a a Battery mini voltage Battery minimum OV peer ie Voltage on Latch Latch the Von point indicates it only can be programmed in the remote control 2 12 Reading Remote Programming Errors The Err annunciator will be turned on when remote programming errors occur The error codes are shown as followings O lxx Command errors O 2xx Execution errors O 3xx Device specific errors O 4xx Query errors 3 E Remote programming errors can be checked by pressing Mad key after pressing 2na Jey on the front panel The remote command SYSTem ERRor can reads back the error codes and error messages when it is in remote con
67. s on the load 4 12 3 Von Point Von Latch Example Set the Von Latch to Off set Von Point to 1V turn on the load This example implements the automatic on off of the load s input which simplifies the test operations greatly The detailed operations are shown below Operation Descriptions Display l Load Default NN Press key to enter into the main menu Yes No Von Latch Use Lv key to select the menu item Von Latch use the knob On Off or gt key to select the parameter Off Press key to confirm Von Point 1 000V Use Y key to select the menu item Von Point use Entry keys or the knob together with e gt keys to input the voltage value Press key to confirm 0 000V 0 000A 0 000A CCH OFF 5 m 0 000V 0 000A o Press eron key to turn on the load 0 000A CCH ON For the above steps the corresponding SCPI commands should be INP VOLT ON LATCH OFF Disables the Von Latch INP VOLT ON Sets the Von voltage point to 1V 58 INPUT ON Turns on the load 4 12 4 Current Limit n CV Mode Example Set the load to CV mode set the voltage value to 2V set the current limit value in CV mode CV Curr Lana to 20A turn on the load The detailed operations are shown below Set the load to CV mode and set the voltage value to 2V please 0 000V 0 000A Ta ener Sl Step2 Load Default Yes No CV Curr Limit 20 000A Press key to enter into the main menu Step3 Use Lv key
68. se Lv key to select Chain m Step17 Use Entry keys or the knob to input 0 it is chained o itself to Chain 0 realize continuous execution PresslEntey key to confirm and save the Chain value in EEPROM assigned by the sequence number 0 000V 0 000A 0 000A CCH OFF 4 6 3 Starting Stopping the Sequence List Examplel Start the No 0 sequence and stop the active sequence operation Operation Descriptions Display Step 3 gt No A Press 21 keys to enter into sequence operation menu Meno 1 Use Entry keys or knob to set the sequence number No to 0 and No 0 Memo Test Power press key to confirm recall the sequence in EEPROM assigned by the sequence number 0 000V 0 000A 0 000A CCH OFF 0 000V 0 0000A Press na fsan keys to activate sequence operation 1 0000A LCCL ON fu 0 000V 0 000A Press 204 8 keys to stop sequence operation 0 000A CCH OFF Clear Press key to exit sequence operation menu For the above steps the corresponding SCPI commands should be LIST RECALL 0 Recalls the number 0 sequence LIST ON Starts sequence operation LIST OFF Stops sequence operation 4 7 Battery Discharge Operation Battery discharge operation diagram The operating procedures for battery discharge operation are shown below l Press ento key to turn off the load and connect the tested battery correctly 2 Press 2r4 E keys to enter into battery discharge operation screen ds Presse
69. select list memo Memo Use knob and keys to edit memo max 10 characters Use Y key to select sequence data Data lt New Edit gt Use 4 gt keys or knob to select New or Edit operation and press key to confirm Use 4 gt keys to select parameters Use Entry keys or use the knob together with J gt keys to input set value or use the knob Set key to select one test mode and press Enter key to confirm After setting the third parameter press key to confirm and enter into the next step If it is needed to modify one step use AM LV keys to select this step The setting operations for this step are the same as the operating procedure 8 If it is needed to add one step to the last step use AY key to select the new step The setting operations for this new step are the same as the operating procedure 8 If it is needed to insert one step above an edited step useLA Y keys to select this edited 48 step The LCD display doesn t flash at this time and press 2na Fs keys to insert a new step The setting operations for this new step are the same as the operating procedure 8 12 If it is needed to delete an edited step useLA Y keys to select this step and press l 8 2nd fae keys to delete If there is only one step exists it will exit the step edit screen 13 Press key to exit step edit screen and save the sequence data in EEPROM assigned by the sequence number 14 Usel key to select
70. sient operation menu LevelL 5 000A LevelH 10 000A TimeL 0 50ms TimeH 0 50ms TimeR 0 20ms TimeF 0 20ms Mode Cont Input Then press key to turn on the input Or via remote command to set SCPI Command Description TRAN ON Enables transient operation CURR LLEV 5 Sets transient current low level to 5A CURR HLEV 10 Sets transient current high level to 10A TRAN LTIM 500us Sets transient low level time to 500us TRAN HTIM 500us Sets transient high level time to 500us TRAN RTIM 200us Sets the time for transient rising edge to 200us TRAN FTIM 200us Sets the time for transient falling edge to 200us TRAN MODE CONT Selects continuous operation INPUT ON Turns on the input Figure 2 6 shows the current waveform of the load the load s input current reaches the transient high level 10A after 200us duration of rising edge and remains at 10A for 500us Then after 200us duration of falling edge the input current reaches the transient low level SA and remains at 5A for 500us Repeat it in cycles 200us 500us 200us 500us lt 200us Fig 2 6 Continuous Transient Operation 2 4 2 Pulsed Transient Operation The trigger function is required for pulsed transient operation When there is no trigger occurs the load remains at the transient low level After a trigger has been received a pulse will be appeared 17 with rising edge transient high level and falling edge three stages then the load returns to the trans
71. sistance medium range CRM and constant resistance high range CRH Examplel Set the load to CRL and set the resistance value to1 5 Q in CV mode Turn on the load and check the present power value The operating procedures are shown below Operation Descriptions Display l MODE CV Press Se key to enter into the mode selection and CURR 50 000V parameter setting menu MODE CRL Use Y key to select CRL RES 0 02002 Pe 0 000V 0 000A Enter 1 Press Enter key to confirm and exit the mode 1 5000 0 CRL OFF 3 Use Entry keys or use the knob together MODE CRL RES 1 5000 2 with J gt keys to input the resistance value to selection and parameter setting menu 38 5 0 000V 0 000A a Press key to turn on the load 1 50002 CRLON 0 000V 0 000A a Check the present power value with a Y l 1 50002 0 000W For the above operating procedures the corresponding SCPI commands should be MODE CRL Sets the mode RES 1 5 Sets the resistance value INPUT ON Turns on the load Example2 Set the resistance value to 1 8 Q in CRL Turn on the load and there are two ways to set the resistance value Solution 1 Operation Descriptions Display MODE CRL PressLS key to enter into the mode selection and RES 150000 parameter setting menu Use Entry keys or use the knob together MODE CRL RES 1 80009 wina keys to input the resistance value to 1 8 0 000 V 0 000A Press key to confirm and exit t
72. t level to 0 5A 4 INPUT ON Turns on the load s input 5 MEAS CURR Measures the actual input current 5 7 CV Mode Example This example presets the trigger voltage to 5V and selects the external trigger source INPUT OFF Turns off the load s input 2 MODE VOLT Selects the CV mode 3 VOLT TRIG 5 Presets the trigger voltage to 5V 4 TRIG SOUR EXT Selects the external input as the trigger source 5 INPUT ON Turns on the load s input In this example when the external trigger signal is received the input voltage will be set to 5V 5 8 CR Mode Example This example sets the current protection limit to 3A sets the time delay to 10s programs the 64 1 INPUT OFF 2 MODE CRM resistance level to 10 2 and reads back the computed power Turns off the load s input Selects the CRM mode 3 CURR PROT LEV 3 DEL 10 Sets the current protection limit to 3A and 10seconds of time delay RES 10 INPUT ON MEAS POW DD Nn fF CURR PROT STAT ON Activates the current protection Sets resistance level to 10 2 Turns on the load s input Measures the input power level 5 9 Continuous Transient Operation Example This example sets CV transient high low levels times for transient rising falling edge high low level times and parameters for transient operation INPUT OFF 2 MODE CV 3 VOLT LLEV 0 5 4 VOLT HLEV 1 5 TRAN LTIM 200us 6 TRAN
73. the error messages will be displayed as they are shown below Error Error Messages Codes eo PRO checksum failed lf there is no error is detected the LCD will show CCH the initial display and the input will be turned off If the parameters was modified previously and saved in location 0 the load will recall these modified parameters automatically After around 20 minutes warm up of the load the following test can be executed Connect the output of a power supply to the load s input with correct polarity to execute CCH 5A and CV 5V operations If the load works normally it will draw 5A or set input voltage to 5V within the allowed tolerance 30 3 4 Connections on the Rear Panel The rear panel is shown as fig 3 1 which mainly includes AC input part and communication interface part The AC input part includes AC input socket Fuse holder and Line voltage switch the interface part includes RS 232 interface and the interface for optional GPIB or USB GPIB xUSB 324040 A Fe ES 110V 220V RFK 7 Bar 22 RS2323 O 3 1 AC input AC power line cord must be appropriate for your local standard The specifications of the fuse 250V 315mA Line voltage switch can switch the voltage from 110V to 220V The selected voltage should be in accordance with the proper voltage in your local place Communication Interfaces RS 232 Interface The load provides a RS 232 interface which is a standard DB9 pin conne
74. tive pole of the power supply to the INPUT terminal If the input is connected reversely the RV 34 protection status of the load will become effective and please try to connect the power supply to the load again at this time After the power supply is correctly connected to the load press 2nd wis keys to clear the RV protection status the relevant details will be described in Clearing Protection Settings 4 4 Turning the Input On Off Input Press key to turn on or turn off the input 4 5 Basic Tests The operating procedures for basic tests are shown below l Presse key to enter into the mode selection and parameter setting menu Ze Use A Y keys to select one basic mode 3 Use Entry keys or use the knob together with gt keys to input set value Uselt to modify the set value or exit the mode selection and parameter setting menu 4 Press key to confirm and exit the mode selection and parameter setting menu Input 5 Press key to turn on the load 4 5 1 CC Mode CC Mode includes constant current high range CCH and constant current low range CCL Examplel Set the load to CCH and set the current value to 5 12A in CV mode Turn on the load and check the present power value The operating procedures are shown below Operation Descriptions Display MODE CV Press S t key to enter into the mode selection and CURR 80 000A parameter setting menu MODE CCH Usel key to se
75. to select the menu item CV Curr Limit use Entry keys or the knob together with gt keys to input the current limit value to 20A Press key to confirm 0 000V 0 0004 2 0004 CCH OFF Step5 0 000V 0 000A Ud Press eno key to turn on the load 2 0004 CCH ON For the above operating procedures the corresponding SCPI commands should be MODE CV Sets the mode VOLT 2 Sets the current value to 2V CV CURR LIM 20A Sets the current limit value to 20A in CV mode INPUT ON Turns on the load 4 12 5 Current Rise Fall Rate in CC Mode Example Set the load to CCH mode set the current value to 2A set the current rise rate Curr Rise Rate in CC mode to 0 002A us set the current fall rate Curr Fall Rate in CC mode to 0 005A us turn on the load turn off the load The detailed operations are shown below Operation Descriptions Display Set the load to CCH mode and set the current value to 2A please 0 000V 0 000A see 4 4 section for detailed operations 2 000A CCH OFF Load Default Press Men key to enter into the main menu 4 Yes No Curr Rise Rate Use Y key to select the menu item Curr Rise Rate use Entry 0 002 A us keys or the knob together with gt keys to input the current value to 0 002A us Press key to confirm 4 v Curr Fall Rate Use key to select the menu item Curr Fall Rate use Entry 0 005A us 59 keys or the knob together with gt keys to input the current
76. trol All errors are saved in one error queue The errors in this error queue are read in the order in which they occurred At most 20 error messages can be saved in the error queue If the occurred errors exceed 20 the last error in the error queue will be replaced with 350 Too many errors The load will not save any additional error message unless you clear or read errors from the queue Once the error message is read 1t will be cleared in the error queue 2 13 Status Report 2l The electronic load incorporates a status reporting register Various status conditions of the load can be reported querying the status register The user can make sure which event has been reported through setting the enable register It will be introduced in details in ARRAY 372x Series Electronic Load SCPI Programming Guide 2 14 Protection Function The electronic load is equipped with the following protection functions Overvoltage OV Overcurrent OC Overpower OP Overtemperature OT Reverse Voltage RV Once any of the above protection function is active the corresponding status bit in the status will be set the input will be turned off with beeps the detected conditions will be displayed the load will enter into the latched protection status and will not respond to other commands except some specific operations For example if an overtemperature conditions has been detected the input will be turned off with beeps and OT wil
77. ue to 40V turn off the load 0 000V 0 000A please refer to 4 4 section for detailed operations 40 000V CV OFF Recall File a Press 272 Baca keys to enter into the recalling menu Bd o Press Entry keys or the knob to select the recalled location 0 Recall File 0 000V gt 000A Press Enter key to confirm and return 20000A CCL ON 55 For the above operating procedures the corresponding SCPI commands should be MODE CV Sets the CV mode VOLT 40 Sets the voltage value to 40V RCL 0 Recalls the values saved in location 0 in EEPROM 4 9 Clear Protection Settings The operating procedures for clear protection settings are shown below 1 Eliminate the reason that causes the protection status ca Descriptions Display Connect the power supply to the load again 0 000V 0 0000A 2 0000A RV OFF 0 000V 0 0000A 2 0000A CCL OFF For the above operating procedures the corresponding SCPI commands should be INP PROT CLE Clears the protection status 4 10 Error Messages When an error occurs to the load the operating procedures are shown below 13 l Press 24 Fens keys to display the error messages Examplel When a wrong command is sent the ERR annunciator will turn red Check the error message The detailed operations are shown below Operation Descriptions Display ERROR 103 aa Press lra lero keys to display the error message ERROR I A If an error occurs repeat the first operation O If no error e
78. value to 0 005A us Press key to confirm yt 1E 0 002A us Jo Enter ea ty a 0 000V 0 0004 2 000A CCH OFF 0 000V 0 000A Input ae Presslenen key to turn on the load 2 000A CCH ON 7 0 000V 0 000A a Presento key to turn off the load 2 0004 CCH OFF For the above operating procedures the corresponding SCPI commands should be MODE CCH Sets the mode CURR 2 Sets the current value to 2A EE 2V CURR RISE RATE 0 002 Sets the current rise rate in CC mode to 0 002A us CURR FALL RATE 0 005 Sets the current fall rate in CC mode to 0 005A us ERE X X 0 005A uso INPUT ON Turns on the load INPUT OFF Turns off the load 4 12 6 Trigger Function Selection Example Select Tran in trigger function selection Trig Function 44 Trig Fonction A Tran Operation Descriptions Display Load Default Press Menu key to enter into the main menu Yes No Trig Function Use LV key to select the menu item Trig Function use the Tran List knob or a key to select the parameter Tran Press key to confirm 0 000V 0 000A 0 000A CCH OFF For the above operating procedures the corresponding SCPI commands should be TRIG FUNC TRAN Selects transient operation TRAN for trigger function 4 12 7 Knob Function Example Enable the knob function Load Default Menu Press Menu key to enter into the main menu Yes No Use Lv key to select the menu item Knob use the knob or 60 o
79. vel in accordance with the preset transient parameters when the toggled transient operation is active o Triggering a list test Enables the present list test when the list operation 1s active Three triggering methods are available for remote control GPIB lt GET gt signal the TRG and TRIGger commands The External trigger input terminal and key on the front panel of the load can be used to trigger can generates a trigger signal to the electronic load The load has three triggering modes BUS EXTernal and HOLD o The BUS mode the trigger source is GPIB lt GET gt signal or TRG command o The EXTernal mode Choose the External trigger input terminal or key on the front panel as the trigger source The input signal at the External trigger input terminal is TTL the 22 falling edge signal is triggered can generates a trigger signal to the electronic load o The HOLD mode Use the command TRIGger MMediate as the trigger source At this time all other triggering methods including TRG become invalid Note The command TRIGger MMediate can be used in all three triggering modes The triggering modes can be selected via the remote command only TRIGger SOURce BUS TRIGger SOURce EXTernal TRIGger SOURce HOLD 2 9 Input Control 2 9 1 Turn On Off the Load The input can be turned on off by pressing ef key or via the remote command INPUT ON OFF Turning the input off zero current does not affect the
80. verse voltage protection status is shown as below Protection status includes overcurrent OC overvoltage OV overpower OP over temperature OT load protection PT and reverse voltage RV 1 8 Remote Programming The commands are sent to electronic load via remote interface RS232 GPIB USB and will be executed after decoding by the processor If there is any error occurs to the command the processor can detect the wrong command and error type and it can maintain the status register as well Chapter2 Functions and Features The functions and features of electronic load will be described in this chapter which helps you to know ARRAY 372x series better 2 1 Local and Remote Control ARRAY 372x series electronic load can be controlled via the front panel or by remote controller via remote interface If it is needed to control the load via the front panel the load has to stay in local control status Local front panel control is in effect immediately after power is applied Remote control goes into effect as soon as the load receives a command via the GPIB or a SYSTem REMote command via RS232 Under remote control status the REM annunciator is turned on all operations on front panel keypad and knobs become invalid except 274 cal keys All operations on electronic load are controlled by remote controller The electronic load will return to local control and REM remote control annunciator is turned off after rec
81. xists the EER annunciator is turned off Repeat the NO ERROR first operation and display will shows NO ERROR For the above operating procedures the corresponding SCPI commands should be SYST ERR Queries the error code and error messages 4 11 Triggered Operation When the triggering mode is EXTernal the triggered operations are shown below 1 Set trigger object please see 2 6 2 section for detailed introduction 2 Press 274 ase keys or trigger terminal TRIG IN to receive low TTL level and a trigger occurs Examplel Select List for the trigger function to trigger a sequence operation The sequence is the one mentioned in Example in 4 6 1 section The detailed operations are shown below Operation Descriptions Step 1 Select List in main menu for the trigger function please see 56 a 4 13 5 section for detailed introduction Press 2 4 Faas keys or trigger terminal TRIG IN to receive low TTL level The load s input will change accordingly when the i E sequence parameters are changed Pressing 2na e keys has 4 oes the same effect as pressing aA keys at this time For the above operating procedures the corresponding SCPI commands should be TRIG FUNC LIST Selects LIST for trigger function TRIG A trigger occurs 4 12 Main Menu The operating procedures for the main menu are shown below 1 Press key to enter into the main menu 2 Usel A keys to sele

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